US840826A - Crucible. - Google Patents

Description

ATTORNEY wa g PATENTED JAN. 8, 1907.

UNITED STATES PATEN EroE.

EDWARD AfooLsr, or NEWARK, NEW JERSEY.

CRUCIBLE.

its. 840,826.

Specification of Letters Patent.

Patented Jan. 8, 1907.

A li ati n fil d November 23, 1905. Renewed October 9. 1906. Serial No. 338,170.

To alt whom it mag/concern:

' Be it known that I, EDWARD A. COLBY, a

citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have'invented a certain new and useiul Improvement in Crucibles, of which the following is a specification.

The invention relates to electrical induction-furnaces for melting metals, wherein the charge forms a closed secondary circuit which is disposed in inductive relation to a primary coil, so that the currents induced in said charge operate'to melt the same.

The invention consists in a crucible formed of sections connected by keys; also, in the va rious combinations set forth in the claims.

. In the accompanying drawings, Figure 1 is a top view ofthe crucible. Fig. 2 is a perspective view of a portion of the upper rim, showing the keyways. Fig. 3 shows one of the keys separately. Fig. 4 is a face view of one of the joints between the crucible-sections. Fig. 5 is an enlarged cross-section on the line so as of Fig. 1.

Similar letters of reference indicate like parts.

The crucible Ais annular in form and is composed of a number of arc-shaped sections, as B, which are placed together.

connect the sections, I provide inthe vertical edge of each section keyways, as G and D,

of dovetail form. When the; sections are brought together'edge to edge, the keyway C D of one section, as B, Fig. 2, meet thekeyways E F of the next section G, thus forming I double dovetail keyways, in which fit keys H; of refractory material. The keys thus hold the sections closely together at. their approximating vertical edges. In order to prevent vertical displacement of the sections, I also form in each section a transverse keyway I, extending at right angles to the keyways C D. When the sections are brought together, j

the meeting keyways I form a .keyway of double dovetail form, the dovetails being one abovetheother. Into the double dovetail i keyway thus made is inserted a key J, similar 7 to H, as shown in Fig. 4-." I thus constructa In order to crucible of sections without the use of any -1. A-crucible formed of arc-shaped/ sections having dovetailed keywaysin their approidm'atin'g edges and keys constructed to fit-in saidkeyways. f I Q 2. A crucible formed of arc-shaped sections having dovetail keywaysparallel to the central axis of said crucible in their approximating edges and keys constructed to' fit in said keyways.

3. A crucible formed of arc-shaped sections having dovetailed keyways at right an gles to the central axis of said crucible, in their approximating edges and keys constructed to fit in said keyways.

4. A crucible formed of arc-shaped sections having in their approximating edges dovetail keyways. parallel to the axisof said crucible and dovetail keyways at right angles to said first-named keyways and keys constructed to fit insaid keyways.

5. An annular crucible formed of sections having in their approximating edges dovetail. keyways and keys constructed to fit in said keyways.-

6. As a new. article of manufacture and After the sections have sale, an arc-shaped crucible-section having two parallel walls, and in the edges of; said walls dovetail keyways disposed relatively at right angles.

In testimony wheredf I have aflixed my signature in presence of twowitnesses. l

-- I -.EDWARD A. COLBY.

Witnesses:

' PARK BENJAMIN, Jr.,

; WM. H. SIEGMAN.

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